[racket] match plus #:super structs => no nice fit?

It looks to me like match doesn't work nicely with #:super structs.  For instance, this program:

#lang racket

(struct a (f1 f2))
(struct b (f3) #:super struct:a)

(match 'whocares
  [(struct b (f1 f2 f3)) 13])


signals the error:

match: wrong number for fields for structure b: expected 1 but got 3 in: (f1 f2 f3)


It's easy to work around this, but it would be nice if it worked.  Am I missing something obvious?

John 


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